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・ Fibonacci
・ Fibonacci coding
・ Fibonacci cube
・ Fibonacci heap
・ Fibonacci number
・ Fibonacci numbers in popular culture
・ Fibonacci polynomials
・ Fibonacci prime
・ Fibonacci Quarterly
・ Fibonacci quasicrystal
・ Fibonacci retracement
・ Fibonacci search technique
・ Fibonacci word
・ Fibonacci's identity
・ Fibonomial coefficient
Fibonorial
・ Fiborgtangen
・ FIBP
・ Fibra
・ Fibra óptica
・ Fibramia
・ Fibramia thermalis
・ Fibrant object
・ Fibras Industriales S.A.
・ Fibrate
・ Fibration
・ Fibre cement
・ Fibre Channel
・ Fibre Channel electrical interface
・ Fibre Channel frame


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Fibonorial : ウィキペディア英語版
Fibonorial
In mathematics, the Fibonorial ''n''!''F'', also called the Fibonacci factorial, where ''n'' is a nonnegative integer, is defined as the product of the first ''n'' positive Fibonacci numbers, i.e.
:_F := \prod_^ F_i,\quad n \ge 1, \text 0!_F := 1,
where ''F''''i'' is the ''i''th Fibonacci number. (0!''F'' is 1 since it is the empty product.)
The Fibonorial of ''n'' (''n''!''F'') is defined analogously to the factorial of ''n'' (''n''!).
The Fibonorial numbers are used in the definition of Fibonomial coefficients (or Fibonacci-binomial coefficients) similarly as the factorial numbers are used in the definition of binomial coefficients.
== Almost-Fibonorial numbers ==

Almost-Fibonorial numbers: ''n''!''F'' − 1.
It is interesting to look for prime numbers among the almost-Fibonorial numbers, i.e. the almost-Fibonorial primes.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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